Compress a PDF

Reduce the file size of a PDF by downsampling embedded images. Text and vectors stay sharp.

The Compress tool reduces a PDF's file size by shrinking embedded images. Text, fonts and vector graphics are untouched — the output looks identical to the original at normal viewing sizes.

How to compress

1. With the PDF open, choose File › Reduce File Size….
2. Pick Smallest, Balanced or Sharpest.
3. Click Reduce File Size.

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Tips

• Compression only helps if the PDF contains images (photos, scans). A PDF with only text and vector graphics will not shrink much.
• Use Smallest or Balanced for documents you will share by email or message.
• Use Sharpest for anything that may be printed.
• The original file is never modified — the compressed result is always a new file.